[DevTools] Support multiple clients in DevToolsAgentHost

content/browser/devtools/forwarding_agent_host.cc

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "content/browser/devtools/forwarding_agent_host.h"
 
 #include "base/bind.h"
 #include "content/browser/devtools/devtools_session.h"
 #include "content/browser/devtools/protocol/inspector_handler.h"
 
 namespace content {
 
 ForwardingAgentHost::ForwardingAgentHost(
     const std::string& id,
     std::unique_ptr<DevToolsExternalAgentProxyDelegate> delegate)
       : DevToolsAgentHostImpl(id),
         delegate_(std::move(delegate)) {
   NotifyCreated();
 }
 
 ForwardingAgentHost::~ForwardingAgentHost() {
 }
 
 void ForwardingAgentHost::DispatchOnClientHost(const std::string& message) {
-  if (session())
-    session()->SendMessageToClient(message);
+  if (!sessions().empty())
+    sessions().begin()->second->SendMessageToClient(message);
 }
 
 void ForwardingAgentHost::ConnectionClosed() {
-  ForceDetach(false);
+  ForceDetachAllClients(false);
 }
 
 void ForwardingAgentHost::AttachSession(DevToolsSession* session) {
   delegate_->Attach(this);
 }
 
 void ForwardingAgentHost::DetachSession(int session_id) {
   delegate_->Detach();
 }
 
 bool ForwardingAgentHost::DispatchProtocolMessage(
     DevToolsSession* session,
     const std::string& message) {
   delegate_->SendMessageToBackend(message);
   return true;
 }
 
+bool ForwardingAgentHost::AttachMultiClient(DevToolsAgentHostClient* client) {
+  if (!sessions().empty())
+    return false;
+  return DevToolsAgentHostImpl::AttachMultiClient(client);
+}
+
 std::string ForwardingAgentHost::GetType() {
   return delegate_->GetType();
 }
 
 std::string ForwardingAgentHost::GetTitle() {
   return delegate_->GetTitle();
 }
 
 GURL ForwardingAgentHost::GetURL() {
   return delegate_->GetURL();
@@ skipping 17 matching lines @@
 
 bool ForwardingAgentHost::Close() {
   return delegate_->Close();
 }
 
 base::TimeTicks ForwardingAgentHost::GetLastActivityTime() {
   return delegate_->GetLastActivityTime();
 }
 
 }  // content